Hinged last.



C. C. DODGE.

HI NGED LAST.

APPLICATION FILED DEC-5,1914.

Patented May 1, 1917.

2 SHEETS-SHEET 1.

C.:C. DQDGE.

HINGED LAST.

APPLICATION FILED DEC.5, 1914.

1,22%451 v Patented 1,1917.

2 SHEET EET 2.

TTNTTE STATE@ PATENT FFTQ.

CHARLES C. DODGE, OF BOSTON, MASSACHUSETTS.

HINGED LAST.

Application filed. December 5, 1914.

To all whom it may concern:

Be it known that I, CHARLES C. DODGE, a citizen of the United States,and resident of Boston, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful Improvements inHinged Lasts, of which the following is a specification.

This invention relates to hinged lasts, and consists in the variousfeatures of structure, arrangement and cooperation hereinafter describedand claimed.

Of the accompanying drawings, which illustrate one form in which theinvention may be embodied:

Figure 1 represents a side elevation,

partly in vertical section, of a hinged last in extended position.

Fig. 2 represents a similar View, omitting the toe and showing theheelpart in a diflerent angular position as for removing the last from ashoe.

Fig. 3 represents a top plan view of the hinge.

Fig. 4 represents a rear elevation of the forepart without the hinge.

Fig. 5 represents a front elevation of the heelpart without the hinge.

Fig. 6 represents, on a smaller scale, a side elevation of the hinge,broken lines indicating the extreme angular positions of the movableparts. v

Figs. 7 and 8 are views similar to Figs. 1 and 2 respectively and show amodification. The modification is embodied in the hinge, and consists inan arrangement of the spring which causes the forepart and heelpart tobe returned in every instance to the position shown by Fig. 7

Fig. 9 represents on a smaller scalea side elevation of a hinge madeaccording to Figs. 6 and 7, broken lines indicating the extreme angularpositions of the movable parts.

Fig. 10 represents an elevation of a heelpart and rear portion of aforepart, dotted lines representing another modified form of hinge.

The same reference characters indicate the same parts wherever theyoccur.

Referring first to the form shown on Sheet 1, the forepart is indicatedat 10 and the heelpart at 11. These parts'have abutting portions, one ofwhich portions has a cylindric external surface 12, and the other ofwhich has a cylindric internal surface 13.

Specification of Letters Patent.

Patented May 1, 1917.

SerialNo. 875,630.

The abutting portion of the forepart is formed with laterally separatedchambers 14 for the reception of the pivotally connected portions of thehinge, and the abutting portion of the heelpart is formed with a chamber15 for the reception of a spring.

The hinge comprises two principal members 16 and 17, portions of whichare bent to form ears to take the pivot pins 18. These ears and pins arearranged in the chambers 14 of the forepart so as to be entirelyconcealed, said chambers being closed at the bottom and sides of thelast and likewise closed at the top of the cylindric portion. Themembers 16 and 17 as shown, are in the form of plates or leaves, and theforepart and heelpart are therefore formed respectively with kerfs 19and 20, and the extremities of the plates or leaves are arranged in saidkerfs. The side edges of the hinge leaves as shown are flush with thesurface of the last. Screws 21 and 22 are screwed from the bottom of theforepart and heelpart respectively through holes 21 and 22 formed in theleaves of the hinge, said screws coacting with the wood above and belowthe leaves to draw the wood with clamping effect against the leaves. Thescrews are preferably of a length sufiicient to reinforce the wood so asto compensate for the weakening due to the formation of the kerfs 19 and20. Screws of the proportions shown reinforce the wood to a degree morethan that required to compensate for the loss of strength due to thekerfs, and enable the last to withstand very great torsional stressalong a line parallel to the length of the last. The stock which isbetween the chambers 14 bears against the leaf 16 of the hinge, and theassembled structure is, to all intents and purposes, as solid and strongto sustain hammer blows upon the bottom of the shank as if no stock werecut away as at 14, 14.

The members 16 and 17 are provided with confronting seats for a helicalcompression spring 25, the seat on the member 16 being indicated at 26and the seat on the member 17 being indicated at 27. The seats areformed with teat portions 28 which are arranged to project into the endsof the spring to keep said ends upon their seats. That portion of thefront leaf which extends to the rear of the hinge pin 18 and which. isindicated at 29 constitutes one member of a toggle, the other member ofthe toggle being the spring 25. When the forepart and heelpart are inthe angular position shown by Fig. 1, the seat 26 is above a lineintersecting the axis of the pin 18 and the seat 27, but when theforepart and heelpart occupy the angular position shown by Fig. 2 theseat 26 is below the said line. In Fig. 6 the seats 26 and 27 areindicated conventionally by dots. Broken lines a and a intersect theaxis of the hinge and the seat 27 'in the two positions of the latter,corresponding respectively to Figs. 1 and 2. Broken lines 7) and 6represent the axis or line of thrust of the spring 25, the angularposition of 7) corresponding to the angular position of the spring inFig. 1, and the angular position of 6 corresponding to the angularposition of the spring in Fig. 2. As the forepart and heelpart move fromone position to the other, the distance between the seats 26 and 27grows less until both of said seats and the axis of the hinge are ondead center or all in line with'each other, and as the seats move out ofsaid line the distance between them increases. The spring thus acts tohold the forepart and heelpart in both of their extreme positions, butis nevertheless capable of yielding to permit shifting said parts fromone position to the other. The spring is entirely inclosed inthe socket15, which socket is open only at the side which is toward and closed bythe fforepart. As far as I am aware, I am the first to have provided ahinged last with hinge members one of which is arranged to act as atoggle member for the purpose explained; and I think I am the first,also, to have combined a connecting hinge and double acting holdingmeans as a self-contained unit. My hinge and holding device are capableof being assembled in cooperative relation before they are put into alast and this relation is not disturbed by setting them into the last.In Fig. 4 I have indicated filling ieces19 for closing the extremitiesof the erf 19 at the sides of the narrow part of the hinge. I

Then the forepart and heelpart are inthe position shown by Fig. 1, thesurfaces '30 of .the member 17 abut against the surfaces 31 of themember 16 for the purpose of sustaining the lasting stresses and forrelieving the abutting portions of the forepart and heelpart from unduestress. This may be better understood when it is explained that thelast, when in lasting position, is inverted, the socket member 32 in theheelpart resting upon a heelj ack (not shown), and the toe of theforepart resting upon a toejack (not shown). The pressure upon the last,due to pulling over the leather and to driving lasting tacks between thepoints directly over the two jacks, has a tendency to buckle the hinge.In hinged lasts as hitherto made, the hinge-pin has been anchoreddirectly in the wood, and the abutting portions 10 and 11 (Fig. 2) ofthe fore-part and heelpart have been relied upon to sustain the stressesin question. The structure of my hinge relieves the wood of suchstresses, the hinge-pins being in no way dependent upon the wood, andthe surfaces 30 and 31 of the hinge members being arranged to abutagainst each other to sustain the stresses which, would-otherwisedevolve upon the wood surfaces 10 and 11.

Figs. 7, 8 and 9 illustrate ih what manner the hinge already describedmay be modified so as to cause the forepart and heelpart to return inevery case to the angular relation shown by Fig. 7. The only differencenecessary to accomplish the result last mentioned is to set the springseats farther forward with relation to the hinge pins than they are inthe form first described. In

Figs. 7, 8 and 9 the spring seats are indicated at 26 and 27 The spring25 in this form is the same as in the first form. By comparing Figs. 1and 7 it may be'seen "that in the forme'r the seat 26 is a considerabledistance behind the center of the hinge pins, while in Fig. 7 the seat26 isnotso far behind the center. A corresponding difference obtains asto the location of the seats '27 and 27'. In consequence of arrangingthe spring seats as shown by Figs. 7, 8 and 9, the seat 26 never crossesthe line which intersects 27 and the axis of the hinge pin. As shown byFig. 9 the hinge is in its normal position, broken line a being arrangedto intersect the rear seat 27 and the axis of the hinge pin. Brokenline 1) represents the axis of the spring when the hinge is in itsnormal position. Broken line a represents the angular position whichwould be taken by 'line a when the forepart and heelpart are in therelation shown by Fig. 8. The point to be observed is that the seat 26is so located that it is always outside the angle defined by lines a anda Broken line b represents the axis of the spring when the forepart andheelpart are in the relation shown by Fig. 8. In all other respects thehinge shown by Figs. 7, 8 and 9 is the same as that first described, andthe same reference characters are used with the exception of those whichindicate the spring seats.

, The hinge indicated by dotted lines in Fig. 10 is the same as thatshown by Figs. 7, 8 and 9 excepting that the front leaf 16' of the hingeis set at an angle which will cause it to occupy the forepart where thestock is thicker. The ball portion of the last shown is a substantialdistance below the shank, and for this reason it might be desirable toincline the front leaf of the hinge as shown by Fig. 10. As the styles'ofla'sts vary in this respect, the angle of thefront leaf of the hingemay be varied accordi'ngly, to the end that such leaf may be arranged inthe most desirable part of the last.

I claim:

1. A hinged last comprising a forepart, a heelpart, hinge-membersconnecting said parts, and a spring attached to said hingemembers andarranged to hold them in a plurality of angular positions.

2. A hinged last comprising a forepart, a heelpart, hinge-membersconnecting said parts, and a helical spring the ends of which arearranged to act upon two portions of said hinge-members to hold thelatter in a plurality of angular relations, said portions being movable,one relatively to the other, to shift the effective line of springstress across the dead center of the hinge.

3. A hinged last comprising a forepart, a heelpart, hingemembersconnecting said parts, and a helical compression spring the ends ofwhich are arranged to act upon two portions of said hinge-members tohold the latter in a plurality of angular relations, said portions beingmovable, one relatively to the other, to shift the effective line ofspring stress across the dead center of the hinge.

4. A hinged last comprising a forepart, a heelpart, hinge-membersconnecting said parts, and a spring pivotally connected to both saidhinge-members and arranged to hold them in a plurality of angularpositions.

5. A hinged last comprising a forepart, a heelpart, hinge-membersconnecting said parts, and a spring arranged between said hinge-membersto coact as a toggle with one of said members to hold said hinge membersin two angular positions.

6. A hinged last comprising a forepart, a heelpart, hinge-membersconnecting said parts, and a helical compression spring arranged so thatits ends bear against both of said members, the spring-engaging part ofone of said hinge-members being arranged to act as one member of atoggle and said spring being arranged to act as the complemental togglemember, to hold said hinge members in two angular positions.

7. A hinged last comprising a forepart, a heelpart, hinge membersconnecting said parts, said hmge-members having spring seats confrontingeach other, and a compression spring seated upon said seats, one of saidseats being arranged to pass between the axis of the hinge and the otherseat and to cross the line intersecting said axis and said other seat.

8. A hinged last comprising a forepart, a heelpart, a hinge connectingsaid parts, and a helical compression spring the ends of which areseated on the two leaves of said hinge, each of said leaves having meansfor keeping the spring on the seats thereof, said spring being arrangedto hold said hingemembers in two angular positions.

9. A hinged last comprising a heelpart and a forepart movable about atransverse axis, pivotally connected hinge members for connecting saidparts, and a spring having its ends seated against both the hingemembers and arranged with its direction of normal thrust at one side ofthe dead center.

10. A hinged last comprising a heelpart and a forepart movable about atransverse axis, pivotally connected hinge members for connecting saidparts, and a spring having its ends seated against boththe hinge membersand arranged with its direction of normal thrust out of the plane of thesaid axis to hold the said parts in normal position.

11. A hinged last comprising a heelpart, a forepart, means connectingsaid parts so that they are capable of movement about a transverse axislocated relatively remote from the bottom of the last, and a springexerting pressure against said last parts and normally located in a linetransverse to and on one side of said axis to hold the last parts innormal position, said spring being movable by relative movement of saidlast parts to a line on the other side of said axis to hold the lastparts at an angle to each other.

12. A hinged last comprising a heelpart and a forepart movable about atransverse axis, a hinge whose members are movable about an axissubstantially coincident with the first-mentioned axis, and a springseated against both said hinge members and moved by one member intodifferent angular rela tion to the other member when said last parts aremoved about their axis of relative movement.

13. A last comprising a forepart, a heelpart, two cooperative hingemembers pivotally connected with each other and affixed respectively tosaid forepart and heelpart, and a helical compression spring seatedagainst both said members, said members having soring-engaging portionsarranged to impar angular movement to said spring to shift the line ofspring stress back and forth across the axis of said hinge members.

14:. A last comprising a forepart, a heelpart, a hinge the leaves ofwhich have flat plate portions, said plate portions being affixed tosaid forepart and heelpart respectively, and having confronting edges,and a helical compression spring the ends of which are arranged againstsaid edges to hold said forepart and heelpart in operative position forlasting, said plate portions having seats for the ends of said spring.

15. A last comprising a forepart having a transverse kerf extendingforwardly from its rear end, a heelpart having a transverse kerfextending rearwardly from its front end, a hinge consisting of platespivotally transverse axis, said last parts having hingerece'sses, ahinge connecting said parts and comprising members fixed in saidrecesses, a COIlGCl compression spring plvotally seated on both saidhinge members, and means for retaining said spring on said seats.

17. A last hinge comprising two an'gularly movable members having hingeconnection, said members having confronting seats for a spring, and ahelical compression spring arranged between and bearing against saidseats, said seats be ng arranged to move said sprmg laterally to shiftits line of thrust toward and from the axis of said hingeconnec'tion inconsequence of relative angular movement of 'saidmembers.

18 A hinged last comprising a forepart and a heelpart capable ofrelative angular movement about a transverse aXis, two hinged'membersfastened respectively to said forepart and heelpart, said members havinghinge-connection with each other on said axis, said members havingconfronting seats for a spring, and a 'lielical'compression springarranged -'be' tw'ee'n and bearing upon said seats, the ali-nement ofsaid seats being substantia lly at right angles to said axis-and offsetfrom the latter when said forepart and hee1- part are in operativerelation. I

In testimony whereof I have afiixed my signature, in presence of tvvoWitnesses.

CHARLES "C. DODGE.

Witnesses:

MARCUS 13. MAY, P. lV. Pnzzn'r'rr.

Copies of this patent "may be obtained for five cents each, byaddressing the Comini'ss'ione'r of ya tents,

Washihgtom'nfl. 3 i

